Thanks.  I'll give it a try.

Jim

"Bob H." <omn### [at] msncom> wrote in message
news:3b32f014@news.povray.org...
> "Jim Kress" <kre### [at] kressworkscom> wrote in message
> news:3b32d0ba@news.povray.org...
> > Here's another result using:
> >
> >    method 3
> >    intervals 20
> >    samples 3,5
> >    confidence 0.999
> >    variance 1/1000
> >
> > What's going on with this?  Looks like the sampling algorithm is not
> > behaving properly.
>
> I hadn't seen the number of layers your df3 might be made up of but that
> intervals change suggests to me there are a few.   Nathan Kopp has made
the
> method 3 somehow figure the intervals out on it's own (I'm guessing) and
> maybe what you really need to do is increase the samples.  I often use
equal
> numbers.  Perhaps a samples 10,10 is okay for you?  If not there's always
> method 2 and samples 5,5 could possibly do well.
>
> Bob H.
>
>

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